Autostereoscopic 3D display device using holographic optical elements

An autostereoscopic 3D display device comprising:

• a first light source and a second light source configured to alternately generate light;
• a light guide panel arranged to guide the light from the first light source in a first direction as a first light beam and the light from the second light source in a second direction as a second light beam;
• and a stack of a plurality of holographic optical elements configured to converge the first light beam and the second light beam from the light guide panel, wherein the light guide panel includes a prism structure configured to reflect the light from the first and second light sources toward a surface of the light guide panel adjoining the stack of the plurality of holographic optical elements;
• wherein the light guide panel and the prism structure are further configured to refract the light from the first and second light sources out of the light guide panel through an air gap towards the stack of the plurality of holographic optical elements;
• wherein the prism structure includes at least one first inclined surface having a first inclined angle and at least one second inclined surface having a second inclined angle;
• wherein the first and second inclined angles are less than 100;
• and wherein each of the plurality of holographic optical elements includes one or more interference patterns recorded by illuminating a reference beam on the holographic optical element based on one or more first incident angles and an object beam on the holographic optical element based on one or more second incident angles.